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This file summarizes all changes made to Tk since version 1.0 was

released on March 13, 1991.  Changes that aren't backward compatible

are marked specially.

RCS: @(#) $Id: changes,v 1.1.1.1 2002-01-16 10:25:47 markom Exp $

3/16/91 (bug fix) Modified tkWindow.c to remove Tk's Tcl commands from

the interpreter when the main window is deleted (otherwise there will

be dangling pointers to the non-existent window).

3/16/91 (bug fix) Modified tkColor.c not to free black or white colors:

some X servers get upset at this.

3/18/91 (bug fix) Modified tkShare.c to fix bug causing "DeleteGroup

couldn't find group on shareList" panic.

3/18/91 (bug fix) Several changes to tkListbox.c and tkScrollbar.c to

handle listboxes (and scrollbars) with zero total entries in them.

3/22/91 (bug fix) Fixed a few ='s in tkListbox.c that should be ==.

3/22/91 (bug fix) Fixed error in main.c that caused BadWindow errors

in some cases where wish scripts invoke "destroy .".

3/23/91 (new feature) Added Tk_CancelIdleCall to remove Tk_DoWhenIdle

handler.

3/23/91 (bug fix and new feature) Added -name option to main.c, made

it more clever about choosing name (was always using the name "wish"

on most Unix systems).

3/23/91 (new feature) Added TK_CONFIG_STRING option to Tk_ConfigureWidget,

used it to malloc strings for various widget options that used to be

Tk_Uid's (e.g. button text, message strings, etc.).  Eliminates core

leaks when values change in continuous non-repeating fashion.

3/29/91 (new feature) Added Tk_Preserve, Tk_Release, and

Tk_EventuallyFree procedures to help manage widget records and avoid

premature memory free-ing.

4/4/91 (bug fix) Fixed problem in tkWm.c where top-level window geometry

wasn't tracking correctly when wm-induced size change also changed window

position (e.g. menus wouldn't be displayed at the right places).

4/5/91 (new feature) Added "invoke" option to widget command for buttons,

check buttons, and radio buttons.

4/5/91 (new feature) Added "unpack" option to "pack" command.

4/5/91 (bug fix) Changed tkPack.c to use new Tk_Preserve code and be

more careful about window deletions that occur while repacking is in

progress.

4/6/91 (bug fix) Major overhaul of deletion code in all widgets to use

Tk_Preserve and Tk_Release.  Should fix many problems.

4/6/91 (bug fix) Changed "winfo children" to generate correct lists

when child names have embedded spaces.

4/6/91 (new feature) Added "screenheight" and "screenwidth" options to

"winfo".

4/18/91 (bug fix) Binding mechanism didn't correctly handle very long

%-substitutions in commands (e.g. long path names) and caused memory

to be overwritten.  Modified tkBind.c to fix.

---------------------- Release 1.1, 4/18/91 -------------------------

4/19/91 (bug fix) Inconsistent ICCCM handling of coordinates of reparented

windows causes windows to gradually walk south when moved or resized.

Fixed tkWm.c to patch around the problem.

---------------------- Release 1.2, 4/24/91 -------------------------

4/26/91 (new feature) Added -geometry and -display switches to wish.

Also wrote wish manual entry.

5/3/91 (bug fix) Fixed bug in tkListbox.c that caused garbage to appear

at right edge of window when strings were to large to fit in window.

5/3/91 (bug fix) Fixed bug in tkListbox.c where topIndex wasn't getting

updated when elements were deleted:  tended to cause errors in

communication with scrollbars.

5/16/91 (bug fix) Fixed bug in tk3d.c, which caused core dumps when

consecutive points in a polygon were the same (happened with some

configurations of radio buttons, for example).

5/16/91 (bug fix) Fixed main.c to allow stdin to be redirected.

6/1/91 (bug fix) Make sure that pointers are never used after being

freed.

6/15/91 (bug fix) Fixed bug in tkBind.c that caused current binding

values to not always be printed correctly.

6/15/91 (bug fix) Make sure that interpreters are always unregistered

when their main windows are deleted, and make wish delete the main

window before exiting.

8/21/91 (misfeature correction)  Automatically set source of window

position to "user" in "wm geometry" command, unless it has been

explicitly set to "program".

9/5/91 (bug fix) Modified option code to accept '#' as a comment

character in .Xdefaults files, in addition to '!'.

9/10/91 (misfeature correction) Changed binding mechanism so that

numeric %-sequences are output in decimal instead of hex.

9/19/91 (bug fix) Fixed bug in Tk_DoOneEvent(1) where it wasn't

checking files and X connections properly so it missed events.

10/6/91 (new feature) Reorganized tkBind.c to provide generic "binding

table" structure, which can be used to create bindings on items in

canvases as well as windows.

10/6/91 (new feature) Upgraded buttons and menus to use new tracing

code in Tcl 6.0.  Allows radio buttons and check buttons to both set

and clear themselves when associated variable changes.

10/17/91 (bug fix) Fixed 2 bugs in listboxes: accidentally advanced the

selection when new entries were inserted in the listbox after the location

of the selected item(s), and goofed up on redisplay if selected item

was deleted and then selection was immediately lost.

10/27/91 (bug fix) "pack unpack" wasn't telling Tk that it no longer

manages window;  this led to core dumps in some situations.

10/31/91 (reorganization) Renamed manual entries so that they are no

more than 14 characters in length.

10/31/91 (reorganization) Changed tk.h and tkInt.h so that tkInt.h

doesn't needed to be included by tk.h.

11/3/91 (portability improvement) Eliminated use of "class" as a variable

name, since it's a reserved word in C++.

11/7/91 (reorganization) Many changes to upgrade for Tcl 6.1 including

use of Tcl hash tables instead of separate "Hash_" module.  The "lib"

subdirectory is no longer needed in Tk.

---------------------- Release 1.3, 11/7/91 -------------------------

11/24/91 (bug fix) Fixed bug causing occasional errors if existing bindings

are modified (FindSequence in tkBind.c forget to set *maskPtr).

11/24/91 (bug fix) Used wrong hash table in Tk_GetColorByValue.  Could

cause new entries to get created unnecessarily.

12/2/91 (bug fix) Changed "bind" code to put backslashes in front of

special characters (e.g. [ or \) that appear in %-replacements, so that

they can be parsed cleanly.

12/10/91 (bug fix) Manual entries had first lines that caused "man" program

to try weird preprocessor.  Added blank comment lines to fix problem.

1/2/92 (documentation cleanup) Changed manual entries for Tk_GetBitmap

and the like to make it more clear that the argument must be a Tk_Uid

and not a string.

1/2/92 (bug fix) Fixed problem where scrollbars that were very short or

very narrow (too small to hold both arrows) could cause negative values

in calls to XClearArea, which crashed some servers.

1/2/92 (bug fix) Fixed bug in TkMeasureChars occurring when maxChars

is 0.  Occasionally affected things like message window geometry.

1/3/92 (new feature) Added procedures Tk_GetJustify, Tk_GetAnchor,

Tk_GetCapStyle, and Tk_GetJoinStyle, plus support for these things

in Tk_ConfigureWidget.

---------------------- Release 1.4, 1/10/92 -------------------------

1/12/92 (bug fix) TkMenubutton.c wasn't cleaning up mbPtr->varName

properly during menubutton cleanup if an error occurred during

menubutton creation.

1/19/92 (bug fix) Fixed off-by-one bug in tkListbox.c that caused

scrollbars to display a slider that was too large.

2/10/92 (bug fix) Tk_CreateFileHandler didn't correctly handle case

where new mask was specified for existing handler.

2/13/92 (bug fix) Tk_DeleteAllBindings wasn't correctly removing

bindings from the pattern table:  only did the removal for the

first pattern in a pattern list.

2/15/92 (new feature) Added procedures Tk_DefineBitmap and

Tk_SizeOfBitmap.  Tk_GetBitmapFromData is now considered obsolete

and probably shouldn't be used anymore.  Tk_GetBitmapFromData

is now implemented by calling Tk_DefineBitmap and Tk_GetBitmap.

2/15/92 (new feature) Added "curselection" and "select clear" options

to widget command for listboxes.

2/15/92 (new feature) Added Tk_3DBorderColor procedure.

2/17/92 (relaxed limitations) Changed scrollbars so they no longer limit

the slider position to lie within the object's range:  can scroll off the

end of an object, if the object permits it.  Changed listboxes and

entries to explicitly prevent viewing off the ends.  Also relaxed

listbox index checks so that out-of-range indices are automatically

adjust to fit within the listbox range.

2/19/92 (bug fix) tkWindow.c tended to leave half-created windows around

if a new window's name was found to be in use already.  Fixed to clean

them up.

2/22/92 (new feature) Added -anchor, -bitmap, -height, -textvariable,

-width options to labels, buttons, check buttons, menu buttons, and radio

buttons.  This means that (a) size can be controlled better, (b) bitmaps

can be displayed in any buttons, (c) the position of the text within the

button can be controlled, and (d) a button can be made to display the value

of a variable, continuously updating itself.  Also changed -selector option

so that if it's specified as an empty string then no selector is drawn

for the button.

2/22/92 (new feature) Changed menus to support bitmaps in menu entries:

added new -bitmap option for entries.

2/26/92 (bug fix) "after" command, when invoked with just one argument,

called Tk_Sleep rather than registering a timer handler and looping on

Tk_DoOneEvent.  As a result, it caused the application to become non-

responsive to X events during the sleep.  Changed to use a Tk_DoOneEvent

loop so that it is responsive.

2/26/92 (bug fix) Tk's main program didn't map the main window until

after the startup script returned.  Changed to map the window as a

do-when-idle handler, so that scripts can cause the window to be

mapped immediately with a call to "update" or "after".

2/28/92 (bug fix) "wm withdraw" wasn't working if invoked before window

was originally mapped:  window got mapped anyway.  Fixed so that the

window doesn't get mapped as long as it's withdrawn.

2/29/92 (new feature) Can use "focus none" to clear input focus.

2/29/92 (bug fix) Fixed tkEvent.c to generate SubstructureNotify events

properly.  These weren't being generated previously.

2/29/92 (bug fix) Fixed entries so that newline characters can be properly

displayed (as `\x0a').  Had to change interface to TkDisplayChars in order

to do this (added flags argument).

2/29/92 (bug fix) Change Tk not to update size and position of top-level

windows directly during calls like Tk_ResizeWindow.  Instead, wait until

actual event is received.  This makes updates happen at same time as

callbacks.

3/6/92 (bug fix) TkMenubutton.c was dumping core when a menubutton was

pressed at a time when there was no associated menu for the button.

3/6/92 (new feature) Added Tk script library directory with official

Tk initialization file "tk.tcl".  Other procedures used by Tk are in

other files.  Tk procedures and variables all have names starting

with "tk_".  Also added Wish startup script "wish.tcl", which sources

both the Tk and Tcl startup scripts.  This means that things like

auto-loading and abbreviation expansion are now available in wish.

Added new variables tk_library, tk_priv, and tk_version.

3/6/92 (new feature) It's now possible to set bindings for whole

classes by using the class name in the bind command.  For example,

"bind Button  {puts stdout Hi!}" will cause a message to be

printed whenever any mouse button is entered.  Can also use "all"

to set bindings for all widgets.  Widget-specific bindings override

class bindings which override "all" bindings.

3/6/92 (reorganization) Changed buttons (all flavors) and listboxes to

eliminate all hard-wired behavior.  Instead, default behavior is set

by class bindings in tk.tcl.  Also set up class bindings for menus,

menubuttons, and entries, which previously had no default behavior at

all.  Scrollbars and scales still have hard-wired behavior that can't

be overridden.

3/7/92 (look-and-feel change) Changed listboxes and entries and menus

to use button 2 for scanning instead of button 3.  This is more consistent

with the official Motif use of button 2 for dragging.

3/10/92 (new features) Added more options to "winfo" command:  screencells,

screendepth, screenmmheight, screenmmwidth, and screenvisual.

3/13/92 (bug fix) Event sharing mechanism (tkShare.c) wasn't checking

to see whether window was mapped before sharing events with it.

3/16/92 (bug fix) Tk_SetInternalBorderWidth was passing wrong window to

geometry-management procedures, causing core-dumps when menu buttons

had their border widths changed.

3/16/92 (bug fix) Menus were setting their geometry directory rather

than using Tk_GeometryRequest mechanism.

3/17/92 (new feature) Added -cursor option to all widgets to set the

active cursor for the widget.  Also added TK_CONFIG_ACTIVE_CURSOR

configure type.

3/18/92 (new feature) Implemented generalized screen coordinates to

allow resolution-independent specification in many cases (but pixel-

based coordinates are still OK).  Added Tk_GetScreenMM(),

Tk_GetPixels(), new configure types TK_CONFIG_SCREEN_MM and

TK_CONFIG_PIXELS.  Changed widgets to use this new configure types

wherever possible (a few of the more complex cases still haven't

been taken care of yet).  Added "pixels" and "fpixels" options to

"winfo" command.

3/18/92 (new feature) First cut at canvas widgets is done and part of

the official Tk now.  Canvases display text and structured graphics,

and allow you to bind commands to events related to the text and

graphics.

3/21/92 (new feature) Added new "place" command.  It implements a

new geometry manager that provides fixed placement, rubber-sheet

placement, and combinations of the two.  Eliminated the commands

"move", "resize", and "map" that were provided by main.c but never

officially supported;  the placer provides all of this functionality.

3/23/92 (bug fix) Fixed bug in tkWm.c where top-level windows were

occasionally not being given the right size.  The problem occurred

when a string of resizes happened all in a row (such as deleting all

the windows in an application and then recreating them).

3/23/92 (new feature) Added Tk_CoordsToWindow procedure and

"winfo containing" command.  These may be used to locate the window

containing a given point.

3/28/92 (new feature) Added "-exportselection" option to listboxes,

so that listbox selection need not necessarily be the X selection.

4/12/92 (bug fix) Changed menu buttons to store name of menubutton

in the associated variable, rather than the name of the menu.  This

is necessary in order to allow several menu buttons to share the

same menu.

*** POTENTIAL INCOMPATIBILITY ***

4/12/92 (bug fix) Fixed core dump that occurred in tkError.c when

removing the first error record from the error list.

4/15/92 (bug fix) Fixed bug in tkBind.c that prevented 

event specifications from being processed correctly:  the "1" was

treated as a button name rather than a keysym.

4/18/92 (new feature) Added Tk_DefineCursor and Tk_UndefineCursor

procedures.

4/18/92 (new feature) Major revision to listboxes.  Can now scroll and

scan in both x and y, plus -exportselection option allows selection not

to be exported.  The "view" widget command has been replaced by "xview"

and "yview", and the "scan" widget command has a new syntax.

*** POTENTIAL INCOMPATIBILITY ***

4/18/92 (new feature) Added -exportselection option to entries, so you

can select whether you want the entry selection to be the X selection

or not.

4/24/92 (new features) Added TK_CONFIG_CUSTOM type to Tk_ConfigureWidget,

plus added new flags TK_CONFIG_NULL_OK, TK_CONFIG_DONT_SET_DEFAULT,

and TK_CONFIG_OPTION_SPECIFIED.  Several other new types, such as

TK_CONFIG_CAP_STYLE, were also added as part of implementing canvases.

4/29/92 (bug fix) Changed "-selector" default for menus to have separate

values for mono and color.

4/30/92 (bug fix) Fixed bug in tkListbox.c where it occasionally generated

bogus scroll commands (last index less than first).

4/30/92 (reorganization) Moved demos directory to "library/demos".

---------------------- Release 2.0, 5/1/92 -------------------------

5/2/92 (bug fix) Fixed problem in tkListbox.c where it was doing too many

redisplays after repeated insertions.  Also reduced number of invocations

of scrollbar commands.

5/7/92 (portability improvement) Changed main.c not to use TK_EXCEPTION

flag;  it isn't needed and it causes problems on some systems.

5/9/92 (bug fix) Plugged core leaks in tkListbox.c and tkBind.c

5/9/92 (bug fix) TkBind.c was accidentally deleting bindings during

attempts to print non-existent bindings.

5/11/92 (bug fix) Maximum name length for applications (name used in

"send" commands) was too short (only 20);  increased to 1000.  Also

fixed bug related to over-long names that caused core dumps.

5/13/92 (bug fix) tkShare.c was using a dangling pointer if a share

group was deleted as a side-effect of a shared event.

5/13/92 (bug fix) Various initialization and core leak problems in

tkGC.c, tkSend.c, tkMenu.c, tkEvent.c, tkCanvas.c, tkCanvPoly.c,

tkCanvLine.c, tkListbox.c, tkEntry.c.

5/13/92 (bug fix) Empty entries could be scanned off the left edge,

displaying a garbage character.

5/13/92 (bug fix) Fixed a few problems with window manager interactions,

such as tendency for windows to spontaneously shrink in size.  By no

means are all of the problems fixed, though.

5/13/92 (performance optimization) Changed Tk_GeometryRequest not to

invoke geometry manager unless requested size has changed.

---------------------- Release 2.1, 5/14/92 -------------------------

5/1/92 (new features) Added flags like TK_IDLE_EVENTS to Tk_DoWhenIdle,

plus added "idletasks" option to "update" command.  Tk_DoWhenIdle arguments

look different now, but the change should be upward-compatible.

5/17/92 (new feature/bug fix) Added support for VisibilityNotify events

to the "bind" command.  For some reason they weren't supported previously.

5/17/92 (new feature) Added "tkwait" command.

5/17/92 (new feature) Added "grab" command.

5/17/92 (new feature) Added "-width" option to messages.  Also changed

messages to use the computed (i.e. desired) line length when displaying,

not the actual width of the window.

5/17/92 (bug fixes) Did some more fiddling with tkWm.c in the hopes

of improving window manager interactions.  Now there won't be more than

one configure request outstanding to the wm at a time.

5/17/92 (bug fix) Arrowheads on canvas lines weren't being translated

or scaled correctly.

5/20/92 (bug fix) Page-mode scrolling didn't work correctly for canvases

(wrong windowUnits was passed to scrollbars).

5/20/92 (bug fix) Changed scrollbars not to lose highlight when pointer

leaves window with button down.  Also changed redisplay to double-buffer

for smoother redraws.

5/21/92 (new feature) Added "gray50" and "gray25" as predefined bitmaps.

5/22/92 (new feature) Buttons can now be disabled using the "-state" and

"-disabledforeground configuration options.  The "activate" and "deactivate"

widget commands for buttons are now obsolete and will go away soon.

Please change Tcl scripts not to use them.

5/23/92 (new feature) Entries can now be disabled using the "-state"

config option.  Also improved class bindings for entries to keep the

cursor visible in the window when operations occur.  Also made slight

improvements in the way redisplay is done.

5/23/92 (new feature) Added "-textvariable" option to entries so that

the text in an entry can be tied to the value of a global variable in

a fashion similar to buttons.

5/27/92 (new feature) Added "-textvariable" and "-anchor" options to

messages.

5/28/92 (new feature) Added "-padx" and "-pady" and "-underline" options

to menubuttons.

5/28/92 (feature change) Changed "-width" and "-height" options on

all flavors of buttons and menubuttons so that they are orthogonal

to "-padx" and "-pady".  It used to be that -width overrode -padx

(no padding).  Now they accumulate.

5/29/92 (new feature) Added "-disabledforeground" option to menus and

all flavors of buttons (can specify color for disabled things rather

than just using stipple to gray out).

5/29/92 (new features) Added many new options to menu entries:

-activebackground, -background, -font, -state, -underline.  The

"disable" and "enable" widget commands for menus are now obsolete

and will go away soon.  Please change Tcl scripts not to use them.

5/29/92 (new features) Added "atom" and "atomname" options to "winfo"

command.

5/29/92 (new feature) Wrote tk_listboxSingleSelect procedure, which

can be used to change listbox behavior so that only a single item is

selected at once.

6/1/92 (new feature) Added new modifier names "Meta" and "Alt" for

"bind" command.

6/3/92 (new feature) Added "winfo toplevel" command.

6/3/92 (new feature) Made several changes for greater Motif compliance,

including:

    - menu retention if you click and release in the menu button,

    - keyboard traversal of menus (see traversal.man)

    - no widget flashing if you set $tk_strictMotif to 1

6/15/92 (bug fix) Fixed problem in tkBind.c where command string for a

binding could get reallocated while the command was being executed (e.g.

bindings that delete or change themselves).

6/15/92 (bug fix) Don't allow "tabWidth" field to become zero in tkFont.c:

can cause core dumps for fonts that don't enough information to compute

tab widths.

6/19/92 (bug fix) Fixed bug in binding mechanism that caused structure-

related events to be reported both to the correct window and its parent.

7/14/92 (bug fix) Changed tkColor.c not to free colors for visual types

StaticGray or StaticColor.

7/15/92 (new feature) Text widgets now exist.  They display any number of

lines of text with a variety of display formats, and include hypertext

facilities.  See the manual page for details.

7/20/92 (bug fix) If a top-level window was put in the iconic state to

begin with, it could be deiconified with "wm deiconify .foo" until it had

first been deiconified by hand from the window manager.  Tk was getting

confused and thought the window was mapped when it wasn't.

7/29/92 (bug fix) Don't permit rectangles or ovals to have zero-sized

dimensions.  Round up to at least one pixel.

7/29/92 (new features) Major upgrade to canvases:

    - new item types: arc, window, bitmap

    - added Bezier spline support for lines and polygons

    - rectangles and ovals now center their outlines on the shape,

      rather than drawing them entirely inside the shape

    - new "coords" and "bbox" widget commands

    - new "-tags" option for all item types.

    - new "-confine" option to prevent scrolling off edge of canvas.

8/6/92 (new feature) Added "-width" and "-height" options to frames.

The "-geometry" option is now obsolete and should be removed from Tcl

scripts:  it may go away in the future.

8/7/92 (bug fix) Error messages in Tk_ParseArgv were sometimes including

the option name where they should have included its value.

---------------------- Release 2.2, 8/7/92 -------------------------

8/7/92 (bug fix) Changed tkCanvas.c to be more conservative in the area

it passes to XCopyArea.

8/8/92 (bug fix) Fixed bug in tkTextDisp.c that sometimes caused core

dumps when text views changed (e.g. typing return on last line of screen).

8/8/92 (bug fix) Fixed bug in menu.tcl that caused errors when using

keyboard to traverse over separator menu entries.

8/10/92 (bug fix) Changed to use OPEN_MAX instead of MAX_FD to compute

maximum # of open files.

8/10/92 (bug fix) Canvases weren't updating scrollbars on window size

changes.  They also weren't recentering canvases on window size changes.

8/10/92 (bug fix) There were still a few places where commands were being

invoked at local level instead of global level (e.g. commands associated

with buttons and menu entries).

8/10/92 (bug fix) TkBind.c used to ignore explicit shift modifiers for

all keys (i.e.  was treated the same as ).  Modified to

allow explicit request for shift modifier, like .

8/13/92 (feature change) Changed default fonts to request "Adobe" fonts

explicitly.

8/16/92 (bug fixes) Modified tkCanvArc.c and tkTrig.c to increase slightly

the bounding boxes for arcs, in order to make sure that proper redisplay

occurs when arcs are moved (little turds were getting left behind).

8/16/92 (bug fix) Modified tkCanvas.c not to redraw at all if the redisplay

area is off the screen.  Also, only do a background clear for the portion

of the redraw area that is on-screen.  Also, reduced size of off-screen

pixmaps used for redisplaying, which speeds up redisplay in some cases.

8/19/92 (bug fix) Canvases that were taller than wide were not being

redisplayed properly.

8/20/92 (new feature) Added Tk_CreateGenericHandler procedure for trapping

all X events (useful for tracing, watching non-Tk windows, etc.).

8/21/92 (bug fix) Widgets weren't always being notified when they got

the focus back again (the problem had to do with grabs and menus in

particular).

8/21/92 (new feature) Added "-state" option to scale widgets.

8/22/92 (new feature) Changed tkBitmap.c to allow tilde-substitution

to occur in bitmap file names.

---------------------- Release 2.3, 8/24/92 -------------------------

8/27/92 (bug fix) Changes to -activebackground and -activeforeground options

for menubuttons were being lost.

8/27/92 (bug fix) Entries were selecting last character when a B1-drag

occurred past the right edge of the text.

8/28/92 (bug fix) Fixed bug in canvases where a grab during a button

press caused the canvas state to lock up so that it didn't select a

new current item.

9/7/92 (bug fix) Changed tkMenu.c to accept numerical menu indices that

are out of range;  now it just rounds them off to the nearest existing

entry.

9/7/92 (bug fix) Fixed bug in tkTextDisp.c that caused core dumps when

invoking "yview -pickplace" widget command on texts that are too small

to hold any lines at all.

9/11/92 (bug fix) Fixed bug in tkTextDisp.c that caused core dumps

when adding tags to non-existent lines.

9/11/92 (bug fix) Line items in canvases didn't permit an empty fill

color (i.e. couldn't make them transparent).

9/14/92 (reorganization) Changed manual entries to use .1, .3, and .n

extensions.  Added "install" target to Makefile to suggest how Tk should

be installed.

9/16/92 (bug fix) Changed tkSend.c to always specify the root window of

screen 0 rather than using DefaultRootWindow.  DefaultRootWindow doesn't

always go to screen 0 on displays with multiple screens, which can result

in send's not being possible between the screens.

9/18/92 (new feature) Added three new options to "wm" command: "protocol",

"client", and "command".  These provide support for window manager protocols

such as WM_DELETE_WINDOW and WM_TAKE_FOCUS, plus support for the

WM_CLIENT_MACHINE and WM_COMMAND properties.

9/30/92 (new feature) Implemented color model support, including

"tk colormodel" command and Tk_GetColorModel and Tk_SetColorModel

procedures.  These allow you to force mono operation even on a color

display.  Also changed color allocation not to give errors when colors

run out, but just to switch to a mono color model.

10/1/92 (bug fixes) Fixed two bugs in tkTextBTree.c that caused core dumps

during text deletion.

10/5/92 (bug work-around) Changed tkColor.c to ignore errors when freeing

colors.  This is needed to work around improper reference count management

for colormap entries under X11/NeWS.

10/7/92 (new feature) Added support for different visual types, including

procedures Tk_SetWindowVisual and Tk_SetWindowColormap, plus macros

Tk_Visual, Tk_Depth, and Tk_Colormap.  The code for this was contributed

by Paul Mackerras.

10/7/92 (new feature) Added Tk_IsTopLevel macro.

10/12/92 (bug fix) Fixed bug in tk.tcl that caused torn-off menus with

cascaded children not to track mouse motion correctly (the cascade

switched in response to mouse motions within the cascaded child).

10/12/92 (new feature) Major changes to focus handling:

(a) Tk watches FocusIn and FocusOut events for focus changes, not Enter

    and Leave, so it will work better with explicit-focus-model window

    managers (e.g. mwm in default mode).

(b) Tk generates FocusIn and FocusOut events for the focus window now.

    The old procedural interface (via Tk_CreateFocusHandler) is obsolete

    and is no longer used inside Tk.  It is still supported for

    compatibility, but won't be for long.  You should change your code

    to use FocusIn and FocusOut events instead.

(c) The model for FocusIn and FocusOut events is different than the

    one described in Xlib documentation.  See the "focus" manual entry

    for details.

(d) If there is no input focus then keyboard events are discarded.  They

    used to be directed to the mouse pointer window, although this wasn't

    documented.  The focus now defaults to the root window.

*** POTENTIAL INCOMPATIBILITY ***

10/15/92 (bug fix) Fixed text items in canvases where they didn't

display the insertion cursor if the item had no characters in it.

10/26/92 (bug fix) Fixed bug in tkSelect.c that occasionally caused

BadWindow X protocol errors when retrieving the selection.  Tk wasn't

making sure that a window existed before using it to retrieve the

selection.

10/30/92 (feature change) Changed canvases so that if the scroll region

is smaller than the window and -confine is on, the scroll region isn't

forced to be centered in the window;  it can be anywhere that meets the

confinement restrictions.

11/2/92 (new feature) Added "winfo exists" command.

11/5/92 (new feature) Changed DoWhenIdle handlers so that if a new

when-idle handler is created as a side-effect of another when-idle

handler, the new handler isn't invoked until Tk has first checked

for other events to process.

11/6/92 (bug fixes, new features) Major overhaul of window manager

interface:

(a) Tk should now work with virtual-root window managers;

(b) windows will now place more accurately on the screen and stay where

    they're supposed to;

(c) size changes handled more reliably;

(d) code now works robustly in the face of withdrawals followed

    immediately by deiconifications.

(e) Added new procedure Tk_GetVRootInfo and new options to "winfo" command:

    vrootx, vrooty, vrootwidth, vrootheight.

(f) Added "overrideredirect" option to "wm".

(g) Fixed bug where change in width-only via "wm geom" didn't always work

   (min and max window sizes weren't being set properly for the wm).

11/6/92 (bug fixes) Modified menus so that they work correctly with

virtual root window managers.  Also fixed bug where menus didn't move

along with their associated windows, so that the menu popped up at

the old location of the window rather than its new location.

11/9/92 (new constraint) Made it illegal to give windows names that

start with upper-case letters, since such names will goof up the

option database by appearing to be classes rather than names.

*** POTENTIAL INCOMPATIBILITY ***

11/10/92 (new feature) Added Postscript output to canvases.

11/13/92 (bug fix) Changed default for maximum size passed to window

manager from 1000000 (which causes some wm's to make windows too large

when "maximized") to the size of the display.

11/14/92 (feature change) Major overhaul of menubuttons and pull-down

menus.  Removed event-sharing code, including Tk_ShareEvents and

Tk_UnshareEvents.  The -variable option for menubuttons has been

removed,and the "post" and "unpost" widget commands for menubuttons

no longer exist.  The "post" widget command for menus no longer

allows a group option.  The procedure tk_menus has been replaced

with a new procedure, tk_menuBar, which has a slightly different

interface.

*** POTENTIAL INCOMPATIBILITY ***

11/20/92 (new features, feature changes) Major overhaul of grab

mechanism to produce more correct event streams.  Also changed Tcl

commands to require explicit window for grab releases (makes it

possible for grabs to work on multiple displays simultaneously).

The old "grab none" command no longer exists, but new options

have been added: "current", "release", "set", and "status".

*** POTENTIAL INCOMPATIBILITY ***

11/20/92 (new feature) Use TK_LIBRARY environment variable to set library

directory location, if it is defined.  Otherwise fall back on usual

compiled-in value.

11/25/92 (bug fix) "wm grid" command was using wrong window.

11/29/92 (bug fix) Fixed core dump that occurred when trying to use

placer on top-level windows: return error instead.

11/29/92 (bug fix) Selection retrieval wasn't making sure that the window

on whose behalf selection is being retrieved actually exists.

12/3/92 (new feature) Added support for Mode_switch key to support the

full ISO character set.  Also added event handlers for MappingNotify

events so that Tk updates itself in response to keycode and modifier

changes.

12/6/92 (bug fix) Ignore recursive attempts to destroy window.

12/9/92 (new demos) Added "tcolor" and "rmt" demos.

12/10/92 (new features) Added "yposition" widget command for menus,

changed "delete" widget command to take an optional second index,

and changed -command option for cascade entries so that it is

invoked when the entry is activated rather than when it is invoked.

*** POTENTIAL INCOMPATIBILITY ***

12/12/92 (implementation change)  Changed the procedures Tk_FreeBitmap,

Tk_NameOfBitmap, Tk_SizeOfBitmap, Tk_FreeCursor, Tk_NameOfCursor, and

Tk_FreeGC to require an addition Display argument.  This is needed for

Tk to function correctly when an application has windows on multiple

displays.

*** POTENTIAL INCOMPATIBILITY ***

12/12/92 (new feature) Started creating a test suite.  Right now it

only has a few tests.

12/12/92 (new feature) Modified the packer so that a window can be

packed in descendants of its parent (used to be restricted to the

parent alone).  This makes it possible to hide extra windows used

for geometry management.  Also, can use generalized screen distances

in the "pack" command.

12/16/92 (feature change) Boolean options such as -exportselection now

print as 0/1 rather than true/false (both the default and current values

print this way).  This makes it easier to use these values in expressions.

*** POTENTIAL INCOMPATIBILITY ***

12/16/92 (name change) The classes "RadioButton" and "CheckButton" have

been renamed "Radiobutton" and "Checkbutton" for consistency.  From now

on widget class names will have exactly one capital letter.

*** POTENTIAL INCOMPATIBILITY ***

12/16/92 (new feature) Added -setgrid option to listboxes.

12/16/92 (new feature) The "destroy" command, and the "delete" widget

command for canvases, now accept any number of arguments, including

zero.

12/16/92 (new feature) Changed internal TkBindError procedure to

Tk_BackgroundError and exported it to Tk clients.

12/16/92 (option name change) Changed the place command's "dependents"

option to "slaves" for better consistency with documentation.

*** POTENTIAL INCOMPATIBILITY ***

12/16/92 (name changes) Renamed the "cursor*" options in entries and

canvases to "insert*".  Also renamed the "cursor" index to "insert" and

the "cursor" widget command to "icursor".  This was done to avoid

confusion between the mouse cursor and the insertion cursor.

*** POTENTIAL INCOMPATIBILITY ***

---------------------- Release 3.0, 12/17/92 -------------------------

12/17/92 (bug fix) Fixed dangling-pointer bug in canvases that occurred

if a  binding deleted the current item.

12/18/92 (bug fix) Core dump occurred if "wm" invoked with no arguments.

Also, tkWm.c wasn't properly setting WM_CLASS property on application

startup.

12/18/92 (incorrect documentation) Updated manual entries for Tk_FreeGC,

Tk_FreeCursor, and Tk_FreeBitmap to reflect new interface that requires

"display" argument.

12/18/92 (missing documentation) Added documentation for the canvas

"postscript" command, which was missing in the 3.0 release.

12/21/92 (bug fixes) There were lots of problems with the new installation

targets in the Makefiles, such as using "cp -f" and not installing

prolog.ps.  Made several other miscellaneous improvements to Makefile.

12/21/92 (bug fix) Arrowheads on canvas line items weren't moving properly

after coordinate changes made with the "coords" widget command.

12/21/92 (bug fix) If top-level window was initially withdrawn, couldn't

ever deiconify it again.

12/21/92 (bug fix) Double-button event sequences didn't always trigger

properly when grabs were in effect.

12/22/92 (bug fix) The packer didn't display any top or bottom windows

after a left or right expanded window, and vice versa.  Also made the

distribution of space among expanded windows more even.

12/28/92 (new features) Several improvements to selection:

(a) Added procedures Tk_ClearSelection and Tk_DeleteSelHandler.

(b) Added "clear" and "own" options to "selection" command, extended

    "handle" option to delete handlers.

(c) Error returns from "selection handle" scripts are now turned into

    selection retrieval errors ("no such selection") rather than an

    empty selection.

(d) Tk responds automatically for targets APPLICATION (name of application,

    so you can "send" to it) and WINDOW_NAME (name of window within

    application.

(e) Added test file "select.test" to test suite.

12/28/92 (bug fix) Fixed problem with flashing menus that occurred

because menu.tcl was willing to unpost and then immediately repost

the same menu.

1/6/93 (bug fix) Test for UnmapNotify events in tkPack.c used = instead

of ==.

1/21/93 (bug fix) Changed many widgets to eliminate use of

DefaultVisualofScreen, DefaultColormap, etc. and use the visuals

and colormaps for the actual windows instead.  Also changed to

inherit colormaps and windows from parent by default.

1/21/93 (new features) Added new winfo options "cells", "depth", and

"visual".

1/23/93 (bug fix) Fixed problem with text display that could result

in negative XCopyArea heights being sent to X server.  This causes some

servers (e.g. some versions of OpenWindows) to crash.

1/25/93 (new feature) Added -postcommand option to menus, so that menus

can be reconfigured before each posting.

1/29/93 (feature change) Changed %X and %Y in bindings so that they

refer to the virtual root rather than the true root.  Although

potentially incompatible, this change should almost always "do the

right thing".

*** POTENTIAL INCOMPATIBILITY ***

1/31/93 (bug fix) Changed "send" code to grab server while updating

the registry property (before this fix, two programs could allocate

the same interpreter name if they started up simultaneously).  In

order to make this fix I had to change the code for reclaiming

names of dead interpreters in a way that sometimes allows dead

interpreters to persist in the registry.

2/1/93 (feature change) Changed entries to allow leftmost "visible"

character to be the end of the text (i.e. no characters actually visible).

This is needed so that the cursor can be displayed even if the last

actual character is too wide to fit in the window.

2/3/93 (bug fix) Fixed two bugs in tkFocus.c:  (a) FocusIn events

were getting lost in some cases because the focus window hadn't been

created yet (e.g. new top-level window pops up underneath the mouse);

(b) Tk was accidentally triggering FocusOut events when the mouse

moved from a top-level window to one of its children.

2/4/93 (new feature) Added "visibility" option to "tkwait" command to make

it easier to wait for a new window to appear on the screen.

---------------------- Release 3.1, 2/5/93 -------------------------

2/10/93 (installation improvements) Makefile improvements:  added RANLIB

variable for easier Sys-V installation, changed to use INCLUDE_DIR

properly, and added SHELL variable for SGI systems.

---------------------- Release 3.2, 2/11/93 -------------------------

2/11/93 (new feature) Added "wm state" command, and improved wm so that

the right thing will happen if you invoke "wm iconify" when a window is

withdrawn.

2/14/93 (bug fix) When -colormap option was used in generating Postscript

for canvases, Tk didn't add an extra space after the color command.

2/14/93 (new feature) Changed "extern" declarations in tk.h to "EXTERN",

which will use the definition of EXTERN from tcl.h and work correctly

in C++ programs.

2/18/93 (bug fix) Item-specific bindings weren't getting deleted from

canvas items when the items were deleted.  As a result, they could

suddenly re-appear for new items if the new items were allocated a

record at the same addresses as the old ones.

2/18/93 (feature reversal) Changed "after" back again, so that it sleeps

*without* responding to events when it is invoked with just one argument;

can always use tkwait plus after with additional arguments to achieve

the effect of responding to events.

*** POTENTIAL INCOMPATIBILITY ***

2/20/93 (bug fix) Fixed bug in tkWindow.c where colormaps weren't being

set correctly for new top-level windows on different screens than their

parents (the bug results in X protocol errors: "invalid Colormap

parameter").

2/22/93 (bug fix) Changed "#!/usr/local/wish" in demo scripts to

"#!/usr/local/bin/wish" to reflect new location of binary.

2/22/93 (new feature) Added new reliefs "groove" and "ridge".

2/25/93 (new feature) Added new built-in bitmaps:  "error", "hourglass",

"info", "question", "questhead", and "warning".  Also added new demo in